Temperature Dependence of the Photoconduction in the Few-Layered ReSe<sub>2 </sub>Field-Effect Transistor

Prasanna Dnyaneshwar Patil; Milinda Wasala; Rana Alkhaldi; Lincoln Weber; Kiran Kumar Kovi; Bhaswar Chakrabarti; Daniel A Rhodes; Daniel Rosenmann; Ralu Divan; Anirudha Sumant; Luis Balicas; Nihar R Pradhan; Saikat Talapatra

Temperature Dependence of the Photoconduction in the Few-Layered ReSe₂Field-Effect Transistor

ORAL

Abstract

We will present the photo response of the few-layered ReSe₂ field-effect transistor fabricated using mechanically exfoliated crystals grown using the chemical vapor transport method. The temperature dependence of the photoconductivity was measured as a function of temperature from 20 K to 300 K using a continuous laser source (λ = 640 nm; E = 1.94eV), over a broad range of illuminating laser power, P_eff (0.2 nW < P_eff < 84 nW). We measured the power dependence of the steady state photocurrent (I_ph) on P_eff (I_ph ~ (P_eff)^γ, where 0.3 ≤ γ ≤ 0.8). The highest responsivity (R) and external quantum efficiency (EQE) obtained from the few-layered ReSe₂ phototransistors at P_eff = 0.2 nW were ~ 2150 A/W and 10⁵%, respectively. These findings and the temperature dependence of the photoconductivity as a function of gate voltage will be presented.

March 7, 2019, 4:30 PM – March 7, 2019, 4:42 PM

Presenters

Prasanna Dnyaneshwar Patil

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA., Physics, Southern Illinois University Carbondale, Department of Physics, Southern Illinois University Carbondale

Authors

Prasanna Dnyaneshwar Patil

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA., Physics, Southern Illinois University Carbondale, Department of Physics, Southern Illinois University Carbondale
Milinda Wasala

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA., Southern Illinois University Carbondale, Physics, Southern Illinois University Carbondale, Department of Physics, Southern Illinois University Carbondale
Rana Alkhaldi

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA., Physics, Southern Illinois University Carbondale
Lincoln Weber

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA.
Kiran Kumar Kovi

Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL-60439, USA.
Bhaswar Chakrabarti

Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL-60439, USA.
Daniel A Rhodes

Columbia University, Physics, Columbia University, National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA., Columbia Nano Initiative, Columbia University, Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA, Mechanical Engineering, Columbia University, Columbia Univ
Daniel Rosenmann

Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL-60439, USA.
Ralu Divan

Argonne National Laboratory, Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL-60439, USA., Center for Nanoscale Materials, Argonne National Laboratory
Anirudha Sumant

Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL-60439, USA.
Luis Balicas

National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA., National High Magnetic Field Laboratory, National High Magnetic Field Laboratory FSU, National High Magnetic Field Lab, Florida State University, Tallahassee, USA, NHMFL
Nihar R Pradhan

Department of Chemistry, Physics and Atmospheric Science, Jackson State University, Jackson, MS-39217, USA.
Saikat Talapatra

Department of Physics, Southern Illinois University Carbondale, Carbondale, IL, USA, Department of Physics, Southern Illinois University Carbondale, IL-62901, USA., Southern Illinois University Carbondale, Physics, Southern Illinois University Carbondale, Department of Physics, Southern Illinois University Carbondale